Sure. But peak marketing for Galaxy's edge is starting and going to continue to ramp up. It's going to capture all of the headlines and drown out anything Universal does right now for a Potter Coaster. It's bad from a opportunity cost standpoint.
But again to the other points I noted, we can see that it's not their MO to officially announce much until much closer to launch for the reasons speculated. They try to negate as much as possible the general public holding off/deferring their vacation plans because they know something new is coming and when.
Another speculation I have too is that Universal is satisfied with their smaller organic attendance growth rather than sharp peaks and valleys. UO and IOA have seen attendance growth of approx. 3% per year over the last 5ish years or more. This is more manageable that a sharp decline followed by a huge spike that they saw saw with Hogsmeade. Disney experienced this with Animal Kingdom (pre and post Avatar Land) and are likely experiencing this with SW:GE (I'm also interested to see what their numbers for Hollywood Studios look like from last year once the TEA report comes out). It can be much easier from an operational standpoint (staffing etc.) having a more predictable attendance pattern.
In the end, whatever they're doing seems to be working for them as a) they continue to have great resort occupancy numbers and b) continue to see year over year park attendance increases.
So I don't see them changing their strategies anytime soon. And to me it doesn't really matter. I get enough info on these boards to be satisfied with info on what's coming than needing Universal to market info any sooner than they do.